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<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2023 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy\Readline;

/**
 * A Readline interface implementation for GNU Readline.
 *
 * This is by far the coolest way to do it, if you can.
 *
 * Oh well.
 */
class GNUReadline implements Readline
{
    /** @var string|false */
    protected $historyFile;
    protected int $historySize;
    // @todo better type for this
    protected ?bool $eraseDups;

/**
     * GNU Readline is supported iff `readline_list_history` is defined. PHP
     * decided it would be awesome to swap out GNU Readline for Libedit, but
     * they ended up shipping an incomplete implementation. So we've got this.
     *
     * NOTE: As of PHP 7.4, PHP sometimes has history support in the Libedit
     * wrapper, so that will use the GNUReadline implementation as well!
     */
    public static function isSupported(): bool
    {
        return \function_exists('readline') && \function_exists('readline_list_history');
    }

/**
     * Check whether this readline implementation supports bracketed paste.
     *
     * Currently, the GNU readline implementation does, but the libedit wrapper does not.
     */
    public static function supportsBracketedPaste(): bool
    {
        return self::isSupported() && \stripos(\readline_info('library_version') ?: '', 'editline') === false;
    }

public function __construct($historyFile = null, $historySize = 0, $eraseDups = false)
    {
        $this->historyFile = ($historyFile !== null) ? $historyFile : false;
        $this->historySize = $historySize;
        $this->eraseDups = $eraseDups;

\readline_info('readline_name', 'psysh');
    }

/**
     * {@inheritdoc}
     */
    public function addHistory(string $line): bool
    {
        if ($res = \readline_add_history($line)) {
            $this->writeHistory();
        }

return $res;
    }

/**
     * {@inheritdoc}
     */
    public function clearHistory(): bool
    {
        if ($res = \readline_clear_history()) {
            $this->writeHistory();
        }

return $res;
    }

/**
     * {@inheritdoc}
     */
    public function listHistory(): array
    {
        return \readline_list_history();
    }

/**
     * {@inheritdoc}
     */
    public function readHistory(): bool
    {
        \readline_read_history();
        \readline_clear_history();

return \readline_read_history($this->historyFile);
    }

/**
     * {@inheritdoc}
     */
    public function readline(?string $prompt = null)
    {
        return \readline($prompt);
    }

/**
     * {@inheritdoc}
     */
    public function redisplay()
    {
        \readline_redisplay();
    }

/**
     * {@inheritdoc}
     */
    public function writeHistory(): bool
    {
        // We have to write history first, since it is used
        // by Libedit to list history
        if ($this->historyFile !== false) {
            $res = \readline_write_history($this->historyFile);
        } else {
            $res = true;
        }

if (!$res || !$this->eraseDups && !$this->historySize > 0) {
            return $res;
        }

$hist = $this->listHistory();
        if (!$hist) {
            return true;
        }

if ($this->eraseDups) {
            // flip-flip technique: removes duplicates, latest entries win.
            $hist = \array_flip(\array_flip($hist));
            // sort on keys to get the order back
            \ksort($hist);
        }

if ($this->historySize > 0) {
            $histsize = \count($hist);
            if ($histsize > $this->historySize) {
                $hist = \array_slice($hist, $histsize - $this->historySize);
            }
        }

\readline_clear_history();
        foreach ($hist as $line) {
            \readline_add_history($line);
        }

if ($this->historyFile !== false) {
            return \readline_write_history($this->historyFile);
        }

return true;
    }
}

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⬅ Naik ke src 6 item

Nama	Tipe	Ukuran	Diubah	Aksi
📁Hoa	dir	—	2025-10-25 15:30	📂 Buka
🐘GNUReadline.php	php	4 KB	2025-10-25 15:30	✏️ Edit 👁️ View
🐘Libedit.php	php	3.4 KB	2025-10-25 15:30	✏️ Edit 👁️ View
🐘Readline.php	php	1.8 KB	2025-10-25 15:30	✏️ Edit 👁️ View
🐘Transient.php	php	3 KB	2025-10-25 15:30	✏️ Edit 👁️ View
🐘Userland.php	php	3.6 KB	2025-10-25 15:30	✏️ Edit 👁️ View